package com.csp.app.util;

import org.springframework.beans.BeansException;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationContextAware;
import org.springframework.stereotype.Component;

/**
 * @author chengsp 2019年3月23日12:15:47
 */
@Component
public class ContextUtil implements ApplicationContextAware {

    private static ApplicationContext applicationContext;

    @Override
    public void setApplicationContext(ApplicationContext applicationContext) throws BeansException {
        if(ContextUtil.applicationContext == null) {
            ContextUtil.applicationContext = applicationContext;
        }
    }

    /**
     *获取applicationContext
     */
    public static ApplicationContext getApplicationContext() {
        return applicationContext;
    }

    /**
     *通过name获取 Bean.
     */
    public static Object getBean(String name){
        return getApplicationContext().getBean(name);
    }

    /**
     *通过class获取Bean.
     */
    public static <T> T getBean(Class<T> clazz){
        return getApplicationContext().getBean(clazz);
    }

    /**
     *通过name,以及Clazz返回指定的Bean
     */
    public static <T> T getBean(String name,Class<T> clazz){
        return getApplicationContext().getBean(name, clazz);
    }

}